CVE-2017-18472 in cPanel
Summary
by MITRE
cPanel before 62.0.4 allows reflected XSS in reset-password interfaces (SEC-198).
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Analysis
by VulDB Data Team • 07/21/2020
The vulnerability identified as CVE-2017-18472 represents a critical reflected cross-site scripting flaw within cPanel software versions prior to 62.0.4. This vulnerability specifically affects the reset-password interfaces, which are fundamental components of the web-based control panel used by system administrators to manage hosting environments. The reflected XSS vulnerability occurs when the application fails to properly sanitize user input before incorporating it into HTTP responses, creating an attack vector that can be exploited by malicious actors to inject malicious scripts into web pages viewed by other users. The security implications are particularly severe given that password reset functionality is often targeted by attackers seeking to compromise user accounts and gain unauthorized access to hosting environments.
The technical flaw manifests in how cPanel processes and displays user-supplied parameters within the password reset interface. When users initiate password reset requests, the application typically generates URLs containing tokens or identifiers that are then reflected back to the user in the response. If these parameters are not properly escaped or validated before being rendered in the HTML output, attackers can craft malicious URLs that contain script tags or other executable code. When a victim clicks on such a crafted link, the malicious script executes within the context of the victim's browser session, potentially allowing attackers to steal session cookies, credentials, or perform other malicious actions. This vulnerability operates under the CWE-79 category of Cross-Site Scripting, specifically classified as reflected XSS where the malicious payload is reflected off the web server rather than being stored.
The operational impact of this vulnerability extends beyond simple script execution, as it can lead to complete account compromise and unauthorized access to sensitive hosting environments. System administrators who use cPanel for managing multiple client accounts become particularly vulnerable, as successful exploitation could allow attackers to reset passwords for other users, access confidential data, or manipulate hosting configurations. The attack surface is broad since password reset functionality is frequently accessed and often involves users who may be less security-conscious when clicking on links. Furthermore, the vulnerability affects cPanel installations that are widely deployed across hosting providers, making it a significant concern for organizations maintaining large-scale hosting infrastructures where a single compromised account could potentially lead to widespread unauthorized access.
Mitigation strategies for CVE-2017-18472 primarily focus on updating to cPanel version 62.0.4 or later, which includes proper input sanitization and output encoding measures. Organizations should implement comprehensive patch management processes to ensure all cPanel installations are updated promptly, as the vulnerability affects the core authentication mechanisms of the platform. Additional defensive measures include implementing Content Security Policy headers to limit script execution, conducting regular security audits of web applications, and educating users about the dangers of clicking suspicious links. The vulnerability aligns with ATT&CK technique T1566.001 for credential access through spearphishing campaigns, as attackers could exploit this flaw to harvest user credentials through crafted password reset links. Network monitoring should be enhanced to detect suspicious traffic patterns related to password reset requests, and organizations should consider implementing multi-factor authentication as an additional layer of protection to mitigate the risk of account compromise even if the XSS vulnerability is successfully exploited.